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一、前言出露于陕西省礼泉县唐王陵一带的砾岩层,一般称之为“唐王陵砾岩”。它的下伏地层为一套页岩、粉砂质板岩夹少许薄层灰岩,再向下为一套灰岩、白云质灰岩,未见底。在唐王陵以北,“唐王陵砾岩”被二叠系不整合覆盖(图1)。为了叙述方便,本文将砾岩层以下的页岩、粉砂质板岩类少许薄层灰岩暂称之为“页岩段”,其下伏的灰岩、白云质灰岩暂称之为“灰岩段”(下同)。1970年,陕西区调队将“唐王陵砾岩”的时代归于早奥陶世早期,并认为其成因属滨海陆源碎屑沉积;将“页岩段”归于中—晚寒武世,“灰
First, the preface revealed in Liquan County, Shaanxi Province, Tang Tombs area conglomerate layer, generally referred to as “Tang Tombs conglomerate.” Its underlying formation is a set of shale, silty slate with a few thin layers of limestone, then down to a set of limestone, dolomitic limestone, no bottom. To the north of the Tang Tombs, “Tang Tombs conglomerates” are covered by unconformity (Figure 1). In order to facilitate the narration, this paper will temporarily below the conglomerate rock shale, silty slate a little thin layer of limestone tentatively referred to as “shale”, the underlying limestone, dolomitic limestone tentatively called “ Limestone section ”(the same below). In 1970, the Shaanxi Regiment transferred the era of “Tang Tombs conglomerate” to the early Ordovician period and believed that the genesis belonged to coastal terrigenous clastic sediments. The “shale segment” was attributed to the Middle-Late Cambrian, and the "gray